Pin xdebug to 3.4.1

Refs: https://bugs.xdebug.org/view.php?id=2332
Refs: reactphp/socket#322
Refs: reactphp/socket#323

Author: WyriHaximus

src/php/utils/docker/alpine/docker-php-dev-mode

@@ -30,7 +30,7 @@ case "$1" in
 		fi
 
     apk add --no-cache linux-headers
-		pecl install xdebug-stable
+		pecl install xdebug-3.4.1
 		docker-php-ext-enable xdebug
 		apk del $apkDel
 

src/php/utils/docker/debian/docker-php-dev-mode

@@ -24,7 +24,7 @@ case "$1" in
 		fi
 
     yes | apt-get install "linux-headers-$ARCH"
-		pecl install xdebug-stable
+		pecl install xdebug-3.4.1
 		docker-php-ext-enable xdebug
 		yes | apt-get purge $PHPIZE_DEPS